インドネシア, カンゲアン鉱区における探鉱開発

抄録

JAPEX and Mitsubishi Corporation jointly acquired an indirect 50% working interest in the Kangean PSC Block in 2007, and are actively conducting the exploration, development and production of the block through the operating company Kangean Energy Indonesia Ltd. (KEI). The block has a diverse inventor y comprising producing fields, an undeveloped discovered field, numerous prospects and leads. The structural geology of the Kangean area is essentially the same as the East Java and Madura Island area to the west, and is divided into three provinces, Northern Platform, Central High and Southern Basin. The petroleum system is common to the East Java area; two petroleum systems have been identified. One is a thermogenic oil and gas system with Pre-Ngimbang and Ngimbang formation source rocks, and another is a biogenic dry gas system with methane accumulations in the shallow horizons.

After JAPEX and Mitsubishi entered the project, KEI has commenced the development of TSB (Terang, Sirasun and Batur) gas field. The Terang gas field has been developed as the Phase I development of TSB gas field, commenced production in May 2012 and produces around 300 MMscfd of gas.

Among the tasks for promising inventories that will be critical to sustain the development of the Kangean Block, the two projects will be technically interesting; one is the West Kangean appraisal drilling, and another is an exploration drilling of South Saubi prospect. The reservoir of the West Kangean gas field are fractured limestone of the Ngimbang formation, DFN (Discrete Fracture Network) geological model has been established, and reservoir simulation has been conducted to optimize the number and location of wells. The South Saubi Prospect is the largest structure in the Kangean Block inventory, and its play type (Reef buildup of Kujung limestone) is the same as the Banyu Urip oil field in East Java.